Tidgraph - show all the tiddlers listed in a custom field

[CHUN LI]

I recently used Tidgraph and want to use custom mode to show all the tiddlers listed in a custom field. 

E.g. if my field "Things to prepare" has "[[Climbing shoes]] [[[WInd jacket]] food" in a tiddler called Climbing, I want to show the graph of these three things linked to Climbing. Is this easy to do? 

[CHUN LI]

I am using tags[] and it is working fine. But I have to put everything in my field to tags.